Dr. Dave is right. Dash caps look and feel cheap, and mine (installed by the PO) didn't fit very well.
I attempted to restore my severely cracked 280Z dash, spent hours filling and sanding until I thought it looked good, textured it and then painted it. It looks WAY better than before, but a year later a couple of hairline cracks have appeared. It's not even back in the car yet and has never been exposed to the Arizona sun. A new dash pad seems like the only option.
@theguppies, I'm seriously interested in your dash pad. I'm sure you are busy trying to get your new business off the ground. Any details you can give about your materials, process, testing, or end results will be really appreciated. Not asking you to disclose anything proprietary, just the sort of information that will make people want to buy your product.